81200360

素因数分解:

$2^3\times 5^1\times {\mathrm{2030009}}^1$

素因数の和:2030020

約数の個数: 16

約数和(自身を含む): 182700900

約数和(自身を除く): 101500540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2030009, 4060018, 8120036, 10150045, 16240072, 20300090, 40600180, 81200360]

約数ペア:

[(1, 81200360), (2, 40600180), (4, 20300090), (5, 16240072), (8, 10150045), (10, 8120036), (20, 4060018), (40, 2030009)]